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Magnesium alloy melt purification method

A melt purification, magnesium alloy technology, applied in the direction of improving process efficiency, etc., can solve the problems of high-efficiency impurity removal, which cannot be achieved at the same time, and achieve the effects of promoting homogenization, reducing production costs, and improving quality

Active Publication Date: 2014-05-28
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the filtration and purification process of magnesium alloys is highly targeted and cannot achieve the purpose of both efficient removal of impurities and degassing at the same time. Therefore, it is urgent to develop a purification method for magnesium alloy melts to achieve the purpose of both degassing and removal of inclusions , to improve the quality of magnesium alloy as much as possible

Method used

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  • Magnesium alloy melt purification method

Examples

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Effect test

Embodiment 1

[0031] This embodiment relates to a method for purifying a rare earth magnesium alloy Mg-3Nd-0.2Zn-0.5Zr by gas rotary blowing combined with ceramic foam filtration, which specifically includes the following steps: 6 / CO 2 or SO 2 / CO 2 or CO 2 / Ar or difluoromethane HFC-32 or HFC134a (ie C 2 h 2 f 4 ) Under the protection of gas, melt the Mg-3Nd-0.2Zn-0.5Zr magnesium alloy and heat it up to 720 ° C. Put the conventional blowing device with rotating blades into the magnesium alloy melt to start rotating and pass in argon or nitrogen to blow The hole diameter of the head is 0.1mm, the rotation speed of the rotating blowing rotor is 150 rpm, the blowing flow rate is 2 liters per minute, and the blowing time is 20 minutes; after the blowing is finished, let it stand for 20 minutes, then cool down to 720°C, remove The scum on the surface of the alloy liquid is poured into the sand mold, and a foam ceramic filter is placed at the sprue of the sand mold. The material of the fo...

Embodiment 2

[0035] This embodiment relates to a high-strength heat-resistant rare-earth magnesium alloy Mg-10Gd-3Y-0.5Zr gas rotary injection combined with foam ceramics filtration purification method, which specifically includes the following steps: 6 / CO 2 or SO 2 / CO 2 or CO 2 / Ar or difluoromethane HFC-32 or HFC134a (ie C 2 h 2 f 4 ) Under the protection of gas, melt the Mg-10Gd-3Y-0.5Zr magnesium alloy and heat it up to 740 ° C. Put the conventional blowing device with rotating blades into the magnesium alloy melt and start to rotate and pass in argon or nitrogen. The hole diameter is 0.2mm, the rotational speed of the rotating blowing rotor is 100 rpm, the blowing flow rate is 1 liter / min, and the blowing time is 20 minutes; after the blowing is finished, let it stand for 20 minutes, then cool down to 720°C, and remove the alloy The scum on the surface of the liquid is poured into the sand mold, and the foam ceramic filter is placed at the gate of the sand mold sprue. The mate...

Embodiment 3

[0039] This embodiment relates to a traditional commercial magnesium alloy ZK60 gas rotary injection combined with foam ceramics filtration and purification method, which specifically includes the following steps: 6 / CO 2 or SO 2 / CO 2 or CO 2 / Ar or difluoromethane HFC-32 or HFC134a (ie C 2 h 2 f 4 ) Under the protection of gas, melt the ZK60 magnesium alloy and heat it up to 720°C. Put the conventional blowing device with rotating blades into the magnesium alloy melt and start to rotate and feed argon or nitrogen gas. The hole diameter of the blowing head is 0.2mm. The rotor speed is 200 rpm, the air blowing flow rate is 2.5 liters / min, and the gas injection time is 10 minutes; after the injection is completed, let it stand for 20 minutes and keep it warm for 20 minutes, then cool down to 700°C, remove the scum on the surface of the alloy liquid, and then cast In the sand mold, a ceramic foam filter is placed at the gate of the sand mold sprue. The material of the cera...

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Abstract

The invention discloses a magnesium alloy melt purification method which comprises the following steps: performing gas rotating blowing purification of a magnesium alloy melt, and then performing foamed ceramic filtration purification treatment, wherein the gas rotating blowing has excellent degassing capacity, introduced inert gas or nitrogen gas bubbles enable inclusions suspended in the magnesium alloy melt to rapidly float upward to the melt surface to effectively remove the inclusions and especially tiny inclusions in the melt, and larger inclusions in the magnesium alloy melt can be further removed by the foamed ceramic filtration purification, the quality of magnesium alloy is greatly improved, the method also promotes the homogenization of magnesium alloy components, and the magnesium alloy production cost is reduced. At the same time, the method is short in processing time, is simple to operate, and suitable for experiments and industrial application.

Description

technical field [0001] The invention belongs to the technical field of metal melt treatment, and in particular relates to a method for purifying a magnesium alloy melt. Background technique [0002] my country is the country with the richest magnesium ore resources in the world. The Chinese Academy of Engineering pointed out in the 2005 "Research Report on the Development Strategy of my country's Rich Resources Magnesium and Magnesium Alloys" that magnesium metal has become a It is an inevitable choice for the sustainable development of my country's material industry in the 21st century. Because magnesium alloy has low density, high specific strength and fatigue strength, good specific elastic modulus and excellent cutting performance, magnesium alloy is widely used in a series of advanced defense fields and daily manufacturing, for example, automobile weight reduction and energy saving And environmental protection requirements promote the large-scale development and applica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B9/02C22B9/05C22C1/06C22C23/00
CPCY02P10/20
Inventor 刘文才吴国华魏广玲丁文江
Owner SHANGHAI JIAO TONG UNIV
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